ActiveRecord::FinderMethods

Find by id - This can either be a specific id (ID), a list of ids (ID, ID, ID), or an array of ids ([ID, ID, ID]). ‘ID` refers to an “identifier”. For models with a single-column primary key, `ID` will be a single value, and for models with a composite primary key, it will be an array of values. If one or more records cannot be found for the requested ids, then ActiveRecord::RecordNotFound will be

[kiyo_hiko]

なんだ42って

[izumin5210]

find_by! / ActiveRecord::RecordNotFoundを吐くfind_by